[pcunite]

Back in the day I used to use UPX to compress my executables to achieve impressively small sizes.

[jackjeff]

I remember doing that for some custom installer I wrote. It felt like a good idea for 5mins until it got flagged by a bunch of anti virus software… had to sign the installer in the end and spent a lot of time reporting false positives.

[pjmlp]

Still common today when dealing with Go executables.